"Light Years" is a song by the American rock band Pearl Jam. Featuring lyrics written by vocalist Eddie Vedder and music co-written by Vedder and guitarists Mike McCready and Stone Gossard, "Light Years" was released on July 18, 2000 as the second and final single from the band's sixth studio album, Binaural (2000). The song peaked at number 17 on the Billboard Mainstream Rock Tracks chart. The song was included on Pearl Jam's 2004 greatest hits album, rearviewmirror (Greatest Hits 1991–2003).

"Light Years" features lyrics written by vocalist Eddie Vedder and music co-written by Vedder and guitarists Mike McCready and Stone Gossard. The song was re-worked from its original demo version titled "Puzzles & Games", as the band felt the original version was too similar to the song "Given to Fly". Vedder on the song:

With "Light Years", Mike McCready had written some music. We were excited about it for a while, but when we got down to recording it, it was too nice, too right there—it was a little too close to "Given to Fly". We changed the tempos, and then one night Mike and I, after working on it all day and getting frustrated, just flipped it backwards, and in about 35 minutes it became "Light Years", with words and everything. It still has a fairly contagious chorus and melody, but it's just sideways enough to make me happy.

McCready on the song:

It was originally kind of a different vibe to that song and it kind of sounded like a song I had written before so me and Eddie kind of sat down and jammed on it one day and just two guitars and out of playing for about an hour it turned into what it is now. And it's kind of a cool, I think, melodic song and lyrically it's pretty beautiful and I have my interpretation about what the song is about and I think everybody should get what they want to get out of it.

Bassist Jeff Ament on the song:

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